Note:We've tried fabric-style "turbo blanket" heat shields from several companies. Their fibers made from lava / pumice / stainless / titanium / whatever are advertised to last forever.Nope. Park in the garage after a good weekend drive, and the next morning there's a small pile of dusty, brittle fibers on the floor beneath the turbocharger.Only a metal shield will hold up to the heat of an air-cooled engine.